The gconf value /apps/gnome-screensaver/embedded_keyboard_enable in Oneiric no longer works obviously. Is there a way to show virtual keyboard in gnome-screensaver 3.x? Does similar dconf value exist?
It makes unlocking the screen without the keyboard on tablets impossible.

The gnome-screensaver was updated to use the new GSettings APIs instead of GConf. You can look through the list of options stored in GSettings by running gsettings list-recursively | less from a terminal, or by using the dconf-editor application.

The settings for gnome-screensaver have moved to the org.gnome.desktop.screensaver schema: